[PVE-User] Ceph df

[Alwin Antreich]

Missed to send it to the list as well. Answers inline.

On February 1, 2022 2:59:59 PM GMT+01:00, "Сергей Цаболов" <tsabolov at t8.ru> wrote:
>Hello Alwin,
>
>In this post 
>https://forum.proxmox.com/threads/ceph-octopus-upgrade-notes-think-twice-before-enabling-auto-scale.80105/#post-399654
>
>I read about *target ratio to 1 and call it a day *, in my case I set to 
>vm.pool  Target ratio 1 :
>
>ceph osd pool autoscale-status
>POOL                                         SIZE TARGET SIZE      RATE  
>RAW CAPACITY   RATIO  TARGET RATIO EFFECTIVE RATIO  BIAS  PG_NUM  NEW 
>PG_NUM  AUTOSCALE
>device_health_metrics          22216k       500.0G   2.0 106.4T  0.0092 
>                                                     1.0            8 on
>vm.pool                                     2734G             3.0        
>106.4T  0.0753        1.0000                                       
>0.8180 1.0             512 on
>cephfs_data                                    0              2.0        
>106.4T  0.0000             0.2000 0.1636   1.0             128         
>     on
>cephfs_metadata                  27843k         500.0G 2.0        
>106.4T  0.0092    4.0              32              on
>
>What you think  I need to set target ratio on cephfs_metadata & 
>device_health_metrics?
```
TARGET RATIO, if present, is the ratio of storage that the administrator has specified that they expect this pool to consume relative to other pools with target ratios set. If both target size bytes and ratio are specified, the ratio takes precedence.
```
From the ceph docs. [0]

>
>To pool  cephfs_data I set the target ratio 0.2  .
>
>Or the target ration on vm.pool need not the *1* but more?
That's up to the kind of usage you're expecting and the ratio set on other pools. See above and the docs. [0]


Cheers
Alwin

[0] https://docs.ceph.com/en/latest/rados/operations/placement-groups/